An electric heating system controlled by a sequencer is not heating. If the technician reads 240 volts across each contact of the sequencer and zero volts across the sequencer element, which of the following is likely the cause of the malfunction? The thermostat is not sending 24 volts to the sequencer element O The sequencer contacts are stuck open The sequencer clement is open The sequencer contacts are stuck closed 107 Multiple Choice 2 points Which of the following conductor types is suitable for damp locations and has a maximum operating temperature of 90"C? Type TW O Type UF Type TFE O Type THHN 108 Multiple Choice 1 point Which of the following thermostat terminals will energize the reversing valve in the cooling mode on a heat pump system? O W Y O R 109 Multiple Choice 1 point Which of the following choices best describes how a heat pump system operates in the heating mode? The outdoor coil rejects heat while the indoor coil absorbs heat Only the electric resistance heaters are operating The indoor coil rejects heat while the outdoor coil absorbs heat Both the outdoor and indoor coils reject heat 110 Multiple Choice 2 points What should a technician check if the burner does not start on an oil furnace using a cad cell primary control? Check to ensure the thermostat is closing to call for heat O Check all of the limit switches to ensure they are closed Check the power supply to the primary control O All of the checks should be made by the technician